Metso Outotec will convert its existing 700 mm Circulating Fluidized Bed pilot plant in Frankfurt, Germany, for hydrogen-based direct reduction of fine ore, applying the proven Planet Positive CircoredTM technology. The pilot plant can also be used for the reduction of high-grade iron fines concentrate and to confirm the design basis for an industrial-scale CircoredTM plant. Commissioning of the plant is expected to take place by December 2023. Once operational, the 700 mm pilot plant will be able to continuously produce 150 – 200 kg/h of direct reduced iron, using 100% hydrogen as the sole reducing agent. The pilot plant will have an integrated pre-heating and reduction section, followed by a gas cleaning and recirculation facility. The investment includes installation of electric heaters in the process, making it an almost zero-carbon-emission plant. The data obtained from the use of electric heaters will be used to scale up the design of industrial heaters capable to running on renewable energy.